package com.sky.service.impl;

import com.fasterxml.jackson.databind.util.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;


    /**
     * @description: 新增分类
     * @param categoryDTO
     * @return void
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setStatus(StatusConstant.ENABLE);
        categoryMapper.insert(category);
    }

    /**
     * @description:分页查询
     * @param: [categoryPageQueryDTO]
     * @return: com.sky.result.PageResult
     **/
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> pageResult = categoryMapper.pageQuery(categoryPageQueryDTO);
        long total = pageResult.getTotal();
        List<Category> records = pageResult.getResult();
        return new PageResult(total,records);
    }

    /**
     * @description:启用禁用分类
     * @param: [status, id]
     * @return: void
     **/
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category = Category.builder().status(status).id(id).build();
        categoryMapper.update(category);
    }

    /**
     * @description:修改分类
     * @param: [categoryDTO]
     * @return: com.sky.result.Result
     **/
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        categoryMapper.update(category);
    }

    /**
     * @description:删除分类
     * @param: [id]
     * @return: com.sky.result.Result
     **/
    @Override
    public void delete(Long id) {
        //起售中的菜品不能删除
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //关联套餐，不能删除
        count = setmealMapper.countByCategoryId(id);
        if (count > 0){
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }

    /**
     * @description:根据类型查询分类
     * @param: [type]
     * @return: java.util.List<com.sky.entity.Category>
     **/
    @Override
    public List<Category> list(Integer type) {
        List<Category> list =categoryMapper.list(type);
        return list;
    }

}
